発展
はってん · hatten · JLPT N3 · noun
development
🌱📈 発 set out + 展 unfold = things setting out and unfolding: development
発 means to emit or set out, as in 出発 (departure). 展 means to unfold or spread, as in 展開 (expansion). Put them together and something starts and keeps spreading outward: development, growth, progress.